Results 21 to 30 of about 1,081,959 (292)

Mediators and moderators of the effect of the game changers for cervical cancer prevention intervention on cervical cancer screening among previously unscreened social network members in Uganda

open access: yesBMC Cancer, 2023
Introduction Cervical cancer (CC) rates are high in Uganda, yet CC screening rates are very low. Our peer advocacy group intervention, Game Changers for Cervical Cancer Prevention (GC-CCP), was shown to increase CC screening uptake among social network ...
Joseph KB Matovu   +8 more
doaj   +1 more source

Assessment of the impact of gillnets on the population structure of the shovelnose guitarfish Rhinobatos productus from the Gulf of California, Mexico

open access: yesCiencias Marinas, 2011
The shovelnose guitarfish Rhinobatos productus is the most abundant species in the artisanal ray fishery of the Gulf of California. This ray is captured when it approaches the coast for reproductive purposes and is highly vulnerable to gillnets used in ...
JF Márquez-Farías
doaj   +1 more source

Active Galactic Nuclei with Starbursts: Sources for Ultra High Energy Cosmic Rays [PDF]

open access: yes, 2009
Ultra high energy cosmic ray events presently show a spectrum, which we interpret here as galactic cosmic rays due to a starburst in the radio galaxy Cen A pushed up in energy by the shock of a relativistic jet.
A. MELI   +12 more
core   +3 more sources

Centaurus A at Hard X-rays and Soft Gamma-rays [PDF]

open access: yes, 2009
Centaurus A, at a distance of less than 4 Mpc, is the nearest radio-loud AGN. Its emission is detected from radio to very-high energy gamma-rays. Despite the fact that Cen A is one of the best studied extragalactic objects the origin of its hard X-ray ...
Bloser   +19 more
core   +1 more source

X-rays

open access: yesBritish Journal of Radiology: Röntgen Society Section, 1926
Bibliography at end of each chapter. ; Mode of access: Internet.
Broglie, Maurice de, 1875-1960 http://id.loc.gov/authorities/names/no00066931 http://viaf.org/viaf/108713223   +1 more
openaire   +1 more source

The formation of heterogeneous storeys in the cambium on the example of Laburnum anagyroides Medik

open access: yesActa Agrobotanica, 2012
The formation of the storeyed pattern of cambium in the first two years of cambial activity and the structure of mature cambium was examined in Laburnum anagyroides, a decorative shrub growing in temperate climate.
Anna Wilczek
doaj   +1 more source

State of Shark and Ray Genomics in an Era of Extinction

open access: yesFrontiers in Marine Science, 2021
Chondrichthyan species (sharks, rays, skates, and chimeras) are a class of high ecological, economic, and cultural significance, and yet they are the most threatened taxa in the marine environment.
Jessica Pearce   +7 more
doaj   +1 more source

New generation Cherenkov telescope array: HADAR and its performance introduction

open access: yesNuclear Physics B
Astrophysical very high energy (VHE) gamma-rays are believed to result almost exclusively from the interactions of populations of highly relativistic particles with ambient matter or photon fields.
Qingyuan Hou   +18 more
doaj   +1 more source

Role of line-of-sight cosmic ray interactions in forming the spectra of distant blazars in TeV gamma rays and high-energy neutrinos

open access: yes, 2011
Active galactic nuclei (AGN) can produce both gamma rays and cosmic rays. The observed high-energy gamma-ray signals from distant blazars may be dominated by secondary gamma rays produced along the line of sight by the interactions of cosmic-ray protons ...
Beacom, John F.   +3 more
core   +1 more source

Chondrichthyan Diversity, Conservation Status, and Management Challenges in Costa Rica

open access: yesFrontiers in Marine Science, 2018
Understanding key aspects of the biology and ecology of chondrichthyan fishes (sharks, rays, and chimeras), as well as the range of threats affecting their populations is crucial given the rapid rate at which some species are declining.
Mario Espinoza   +9 more
doaj   +1 more source

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